This Remington manufactured late variation .625" long extractor spring is for the model 11-48 semi-auto shotgun in 12, 16, 20, & 28 Gauge and is in excellent condition overall. (file photo)
Note: Remington model 11-48 semi-auto shotguns with the following gauge and serial numbers have been observed with this part:
12 Gauge: 5071108, 5075577, 5102735 & 5112147
16 Gauge: 5522646, 5529558, 5550951 & 5564860
20 Gauge: